I have a 99 KX250 and I have tried the Iridium plugs. I believe they are BR8EIX. The manual calls for BR8EVX. Those are no longer made. These plugs cost me 12 or 13 dollars apiece. I used them for a long time before moving on to the BR8EG. I have not fouled a plug since using the EG. It is a good plug in the same heat range for half the price of the Iridium.
